English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The aim of this study is to design and evaluate a simple free running analog&#x2013;digital converter (ADC) based on the field-programmable gate array (FPGA) device to accomplish the energy and position readout of the silicon photomultiplier (SiPM) array for application as positron emission computed tomography scanners. This simple FPGA-ADC based on a carry chain time-digital converter (TDC) implemented on a Kintex-7 FPGA consists of only one off-chip resistor so it has greater advantages in improving system integration and reducing cost than commercial chips. In this article, an FPGA-ADC-based front-end electronics prototype is presented, and both the design principle and implementation considerations are discussed. Experiments were performed using an <inline-formula> <tex-math notation="LaTeX">$8 \times 8$ </tex-math></inline-formula> (crystal size: 4 mm <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 4 mm <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 15 mm) and a 12 <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 12 (crystal size: 2.65 mm <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 2.65 mm <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 15 mm) segmented LYSO crystals coupled with an <inline-formula> <tex-math notation="LaTeX">$8 \times 8$ </tex-math></inline-formula> SiPM (J-series, from ON Semiconductor) array which is under <sup>22</sup>Na point source excitation. Initial test results indicate that the energy resolution of the two detectors after correction is around 13.2&#x0025; and 13.5&#x0025; at 511 keV, and the profiles of the flood histograms show a clear visualization of the discrete scintillator element. All measurements were carried out at room temperature (&#x007E; 25&#x00B0;C), without additional cooling.

Design and Evaluation of an FPGA-ADC Prototype for the PET Detector Based on LYSO Crystals and SiPM Arrays